0 Question 2 v A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 2% margin of error at a 95% confidence level, what size of sample is needed? Give your answer in whole people. 0 Question 6 v The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 49.7 for a sample of size 1004 and standard deviation 14.2. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 80% confidence level). Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). We wish to estimate what percent of adult residents in a certain county are parents. Out of 100 adult residents sampled, 33 had kids. Based on this, construct a 95% confidence interval for the proportion, p, of adult residents who are parents in this county. Give your answers as decimals, to three places.

More than 51% of car crashes occur within 2 miles of the motorists home. Express the null and alternative hypotheses in symbolic form for this claim (enter as a percentage). H0117 H1:p Use the following codes to enter the following symbols: 2 enter >= g enter You are conducting a study to see if the probability of catching the flu this year is significantly more than 0.35. You use a significance level of a = 0.005. H0230: 0.35 H1:p > 0.35 You obtain a sample of size n = 668 in which there are 250 successes. What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... 0 less than (or equal to) a O greater than a: This p-value leads to a decision to... O reject the null O accept the null O fail to reject the null As such, the final conclusion is that... Q There is sufficient evidence to warrant rejection of the claim that the probability of catching the flu this year is more than 0.35. Q There is not sufficient evidence to warrant rejection of the claim that the probability of catching the flu this year is more than 0.35. O The sample data support the claim that the probability of catching the flu this year is more than 0.35. Q There is not sufficient sample evidence to support the claim that the probability of catching the flu this year is more than 0.35. 0 Question 13 v You wish to test the following claim (Ha) at a significance level of a = 0.005. H041 = 89.6 Ha:,u You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: Find the 90% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place). Answer should be obtained without any preliminary rounding. 0 Question 16 v Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 375 with 54.9% successes at a confidence level of 80%. M.E. = % Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Round final answer to one decimal place 0 Question 18 v Express the confidence interval 42.2 % i 8 % in interval form. l: Express the answer in decimal format (do not enter as percents). 0 Question 21 v Suppose you use simple random sampling to select and measure 44 watermelons' weights, and find they have a mean weight of 70 ounces. Assume the population standard deviation is 12.8 ounces. Based on this, construct a 99% confidence interval for the true population mean watermelon weight. Give your answers as decimals, to two places :I: ounces 0 Question 22 v SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SAT score of first year students at your college. If you would like to limit the margin of error of your 95% confidence interval to 25 points, how many students should you sample? Make sure to give a whole number